Rivet-calking tool.



. Patented 066.9, |902.

P. .1. s weenav.' BIVET CALKING TO0L.-

` (Application led Supt. y., 1909.) (No Mqdel.)

n l n Inlilinl \:/7////// UNITED STATES PATENT EEICE.

PATRICK J. SWEENEY, OF ELIZABETH, NEW JERSEY.

Rlvl-:T-CALKING Tool..

SPECIFICATION forming part of Letters Patent No. 71 5,624, dated December 9, 1902 Application filed September 6, 1902. Serial No. 122,340. (No modelJ y T all whom it may concern:

Be it known that I, PATRICK J. SWEENEY, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Rivet-Calkng Tools, of which the following is a specification.

The object of this invention is to provide means for calking the rivets of boilers, tanks, and other vessels after the plates have been joined together by the rivets in the usual manner; and for this purpose the invention consists, essentially, of a rivet-calking tool v rivet-calking tool ready for calking the rivet.

Fig. 2 is a similar View showing the calkinghammers applied in the act of calking. Fig. 3 is a transverse section taken on line 3 3, Fig. l; and Fig. 4 is a front view of one of the calking-hammers.

Similar letters of reference indicate correspending parts.

Referring to the drawings, A indicates one of the plates of atank, boiler, or other vessel, whichplate has been riveted to the adjacent plate B by means of the rivet C. When the plates have been so riveted, it frequently becomes necessary to further compress the head c of the rivet C in toward the plate A to insure thereby an absolutely tight joint.

My rivet-calking tool consists of a preferably cylindrical casing or exterior shell D open at one end, which is placed on the upf per or outer plate A. TheI other end of the shell D is contracted and in the same is screwed or otherwise secured a bushing E, preferably of any suitable bearing metal, as

babbitt, dac. Reciprocating in the bushing is a hammer-operating piston P, the outer end F of which is adapted to be coupled to the reciprocating piston-rod of any suitable motor, preferably a pneumatic motor, the other end of said piston being provided with an enlarged spherical head suitable for transmitting power to the calking-hammers.

The calking-hammers H consist each of a shank h, which is recessed at or near its middle part at its inner side, in which recess 7c is placed a hammer-pin t', which holds the calking-hammer in 'position in the casing. At the outer side of the hamm-er corresponding to the recess is a rounded fulcruin lug or mount l, that acts as a bearing for the hammer against the casing-wall. At one end of ,the calking-haminer H is an enlarged head m, having an inclined face at its inner side, which face is preferably provided with a groove or concave recess adapted to fit the piston-head G of the reciprocating operating-piston. Fastened to this upward rear end m of the hammer H is any suitable return-spring S, which forces the end m of the hammer H away from the casing or exterior shell D. At the other end of the calking-hammer H is a preferably pointed nose or calking-face n, suited to act on the metal of the rivet-head c to force the same tightly against the plate'A and to insure thereby a tight and perfect joint. The hammer-pins t' are preferably made slightly tapering, as shown in Fig. 3, and are inserted each in two bored holes in the walls of the casing D, the wider end of the pin having an oset head 1*, and the smaller end being provided with a small cotter-pin t, so as to secure the hammer-pins in place. The calking-hammers H are thus firmly held and pivoted by the pins t on their recessed side and by the casing or exterior shell D on their outer side, as the rounded fulcrum lug or mount Z acts as a bearing of the hammerH on the casing D.

The operation and application of my improved tool is the following: After the plates A and B have been riveted by a number of rivets C in the usual manner my improved rivet-calking tool is set over a rivet C, as shown in Fig. 1, and then the hammer-operating piston-rod is rapidly oscillated by any pneumatic motor or other suitable means.

IOO

The piston P is thereby caused to acton the rear end fm of each hammer H and move it out toward the casing D against the tensile force f the spring S. As the calking-hammer IPis pivoted in its recess 7c by the pin t' and at the same time moves on its roundedV the return-spring S will force the ends on in-y ward toward the center of the riveter, the nose n will travel outward toward the casing, and the riveting-hammers will be placed in position ready for their next active stroke. This repeated action of the hammer ends or calking-faces macting withconsiderable force and pressure on the rivet-head, and the successive turning of the rivet-calking tool, so as to compress the metal of the rivet-head on all sides, will quickly and efficiently calk the rivet, so as to close the small space between the rivet-head and the plate.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A rivet-calking tool, comprising an exterior shell or casing open at its lower end for receiving the rivet to be calked, a plurality of movable calking-hammers in said casing arranged to receive the rivet-head between them, and means for simultaneously operating said calking-hammers into and out of contact with said rivet-head, substantially as set forth.

2. A rivet-calking tool, comprising an eX- terior shell or casing open at its lower end for receiving the rivet to be calked, a plurality of pivoted calking-hammers arranged in said casing in upright position and adapted to receive between them at their lower ends the head of the rivet to be calked, and an operating-piston guided in said casing and provided at its inner end with means for simultaneously actuating said hammers, substane tially as set forth.

3. A rivet-calking tool, comprising an eX- terior shell or casing open at its lower end for receivingthe rivet to be calked, a plurality of pivoted calking-hammers arranged in said casing in upright position and adapted to receive between them at their lower ends the head of the rivet to be calked, an operatingpiston guided in said casing and provided at its inner end with means for simultaneously actuating said hammers, and means for returning said hammers to their original position aftereach forward movement of the same, substantially as set forth.

4t. A rivet-calking tool, comprising an exterior shell or casing open at its lower end for receiving the rivet to be calked, a plurality of calking-hammers symmetrically arranged in said casing, each hammer comprising a shank provided at its inner face with a recess and at its ou ter face opposite said recess with a rounded lug or mount adapted to bear against the side wall of the shell or casing, a lower end or nose shaped for attacking the rivet-head, and an upper end or head provided with an inclined longitudinally-grooved face, a curved and tapering horizontal pivotpin for each hammer secured at its ends in the casing and engaging the hammer in its re cess for pivoting the same in vertical position, a compression return-spring for each hammer located between the head ot the same and the casing-wall, an operating-piston guided vertically in the casing and adapted to be reciprocated in the same toward and away from said hammers, and a rounded head at the inner end of said piston, for engaging in the inclined grooves of the hammer-heads, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

PATRICK J. Sl/VEENEY. 

